Annealing pot



May 13 1924. 1,493,838

- w. BARRON ET AL ANNEALING POT E iled Sept. 5 1922 Patented May 13,1924.

WEILLIAM BARRON AND CHARLES A. BARRON, F PRESTON, ENGLAND.

ANNEALING POT.

Application filed September 5, 1922. Serial No. 586,294.

To all whom it may concern:

Be it known that we, WILLIAMBARRON and CHARLES A. BARRON, subjects ofthe King of- Great Britain, residing at Preston,

in the county of Lancaster, England, have invented certain new anduseful Improvements in Annealing Pots, of w lowing is a specification.

hioh the folis invention relates to pots in which metals are annealed orotherwise treated by heat without becoming tarnished, and it consists inthe novel construction and combination of the scribed and claimed.

parts hereinafter fully de- 1 The drawing shows a vertical sectionthrough an annealing pot constructed ac-v cording to this invention.

- The pot a is of any approved construction, and it has a removable lid0. The lid preferably has a flange c downwardly into sand '7) in whichprojects a groove a around the top edge of the pot, so as to make agas-tight oint.

A lifting plate 2' rests OIl-the bottom of 2a the pot, and is providedwith z having an eye 2' at its top.

a lifting rod A hood h is arranged inside the pot to cover the articlesbeing treated. This hood rests on the lifting vplate, and its top h athrough which the eye projects A receptacle j for charcoal as a hole 7a,or other purifying agent, is provided around the said eye, and j areperforations in that portion of'the top of the hood which forms thebottom of the said receptacle. The lid 0 has a tubular projection Zsecured to it, and provided with a passage m for gas, and a conicalouter surface m. plpe n for the adm1ss1on of a non-oxidlzinggas', suchas or- 40 dinary illuminating gas,

weight 0 which has a conical ch ed to fit closely over the conic so asto make a gas-tight joint.

is secured to a amber adapta lifting The weight and gas pipe areprefer-ably removed during the heating process. The charcoal in thereceptacle 7', coupled with the natural issue through the perforationsof the gases formed in the hood as the result of the heating, preventsany ingress of air to the hood during the heating operation. When theheating is completed the weight and gas pipe are placed in position, anda supply of non-oxidizing gas is connected to the pipe. The space orchamber formed between the hood and the sides of 5! the pot and its lidis filled with the nonoxidizing gas, which is drawn into the hoodthrough the charcoal, or other purifying agent in the receptacle j, asthe cooling proceeds. The metal articles being treated -or annealedinside the hood are in this manner kept bright and are prevented fromoxidizing.

What we claim is: I 1. An annealing pot provided with a lid,

plate resting on the pot, a hood resting on the said plate and forming agas chamber with the pot and lid, and means for admitting anon-oxidizing gas through V the said chamber into the hood. 7.0

2. An annealing pot asset forth in claim 1, andhaving at the top of thesaid hood a receptacle for a purifying agent having a perforated-bottomwhich permits the passage of gases between the interior of the,75 hoodand the said chamber.

3. An annealing pot as set forth in claim 1 and having a conical tubularprojection on its lid, and an inlet pipe for the gas pro ber' which fitsover the conical projection and forms with it a gas-tight joint.

In testimony whereof we affix our signatures. WM. BARRON. C. A. BARRON.

